What is electron transport in oxidative phosphorylation?
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What is electron transport in oxidative phosphorylation?
Oxidative phosphorylation is made up of two closely connected components: the electron transport chain and chemiosmosis. In the electron transport chain, electrons are passed from one molecule to another, and energy released in these electron transfers is used to form an electrochemical gradient.
Where does oxidative phosphorylation get electrons?
In oxidative phosphorylation, oxygen must be present to receive electrons from the protein complexes. This allows for more electrons and high energy molecules to be passed along, and maintains the hydrogen pumping that produces ATP.
What is the formula for oxidative phosphorylation?
The oxidative phosphorylation products are: NAD+ N A D + : NADH is one of the high-energy intermediates produced from glycolysis and the Krebs cycle.
What are the three parts of oxidative phosphorylation?
The three major steps in oxidative phosphorylation are (a) oxidation-reduction reactions involving electron transfers between specialized proteins embedded in the inner mitochondrial membrane; (b) the generation of a proton (H+) gradient across the inner mitochondrial membrane (which occurs simultaneously with step (a …
How many electrons does ubiquinone carry?
two electrons
Quinone electron carriers. Ubiquinone in the respiratory chain picks up one H+ from the aqueous environment for every electron it accepts, and it can carry either one or two electrons as part of a hydrogen atom (yellow).
What do electrons do in the electron transport chain?
The direct purpose of moving electrons down the electron transport chain is to pump protons (hydrogen ions) into the intermembrane space. This creates a chemiosmotic gradient that the cell uses to generate ATP by selectively allowing hydrogen ions to move back into the mitochondrial matrix.
What is the final electron acceptor during oxidative phosphorylation?
elemental oxygen
Given its greater availability in the atmosphere, elemental oxygen is used as the final electron acceptor in oxidative phosphorylation.
How many electrons does FADH2 carry?
Both NADH and FADH2 donate two electrons to the electron transport chain, so theoretically they should make the same amount of ATP.
What is the final electron acceptor in the electron transport chain?
Oxygen
Oxygen is the terminal electron acceptor in the mitochondrial electron transport chain and therefore is required for the generation of energy through oxidative phosphorylation.
How many electrons does cytochrome c carry in oxidative phosphorylation?
one electron
Electrons are passed from one cytochrome to an iron-sulfur protein to a second cytochrome, then finally transferred out of the complex to a mobile electron carrier cytochrome C, which can only carry one electron at a time.
Is ubiquinone an electron carrier?
Ubiquinone is an electron carrier only; it is not a proton pump. Therefore, ubiquinone does not increase the H+ concentration in the intermembrane space. The reduced form of ubiquinone then continues to move through the hydrophobic region of the membrane by diffusion.
What is the final electron acceptor for oxidative phosphorylation?
Which molecule is the final electron acceptor?
oxygen molecule
The final electron acceptor for the electron transport chain in aerobic respiration, is an oxygen molecule, O2.
How many electrons are carried by NADH and FADH2?
Explanation: Both NADH and FADH2 donate two electrons to the electron transport chain, so theoretically they should make the same amount of ATP.
How do NADH and FADH2 carry electrons?
The electron transport chain is located on the inner membrane of the mitochondria, as shown below. The electron transport chain contains a number of electron carriers. These carriers take the electrons from NADH and FADH2, pass them down the chain of complexes and electron carriers, and ultimately produce ATP.
What is the final electron acceptor in oxidative phosphorylation?
How many electrons does cytochrome carry?
Cytochrome c carries one electron, as the iron is converted between Ferrous (II) and Ferric (III) forms.
What is the fate of the 4 electrons from cytochrome c in complex IV of the respiratory pathway?
Four electrons are used to reduce one oxygen molecule into two water molecules. Four protons are picked up from the matrix in this process.
What is final electron acceptor in ETC?
